I have a month old calf that hasn't been acting right the last couple days. I gave him a shot of penicillin in the left hip. Almost immediately after he could not stand on his left rear leg. If he was standing still he was ok. As soon as he used that leg he went down. When I gave him the shot I felt the needle hit the bone and backed off some before injecting. Did I totally screw him up? I know when I used to get injections in my knees if the Doc hit the bone it really hurt. Hopefully it will pass in a day or two. Any thoughts?